Author: Fabian Greffrath <fabian+debian@greffrath.com>
Description: Replace "extern inline" with "static inline" in io.h
 to allow for non-optimized builds.

--- invaders-1.0.0.orig/io.h
+++ invaders-1.0.0/io.h
@@ -50,7 +50,7 @@
  * Talk about misusing macros..
  */
 #define __OUT1(s,x) \
-extern inline void out##s(unsigned x value, unsigned short port) {
+static inline void out##s(unsigned x value, unsigned short port) {
 
 #define __OUT2(s,s1,s2) \
 __asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
@@ -60,7 +60,7 @@ __OUT1(s,x) __OUT2(s,s1,"w") : : "a" (va
 __OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \
 
 #define __IN1(s) \
-extern inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
+static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
 
 #define __IN2(s,s1,s2) \
 __asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"